An acoustic measurement device in an air flow and subjected to a noise source, the device including: a base having a surface in contact with the air flow, a first microphone which is mounted flush with the surface, a second and a third microphone which are mounted on either side of the first microphone, each, at the bottom of a cavity opening onto the surface, and where each of the second and third microphones is covered with a noise-reducing element, the second and the third microphones being assembled at a distance from the first microphone that is greater than the correlation length of the turbulent phenomenon in the frequency band studied, and a computer or processor provided for computing the power spectrum of the noise source from the signals detected by the three microphones.
ACOUSTIC MEASUREMENT DEVICE IN AN AIR FLOW
2015-08-27
Patent
Elektronische Ressource
Englisch
IPC: | G01H MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES , Messen von mechanischen Schwingungen oder Ultraschall-, Schall- oder Infraschallwellen / B64F GROUND OR AIRCRAFT-CARRIER-DECK INSTALLATIONS SPECIALLY ADAPTED FOR USE IN CONNECTION WITH AIRCRAFT , Boden- oder Flugzeugträgerdeckeinrichtungen besonders ausgebildet für die Verwendung in Verbindung mit Luftfahrzeugen / H04R LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS , Lautsprecher, Mikrofone, Schallplatten-Tonabnehmer oder ähnliche akustische, elektromechanische Wandler |
Acoustic impedance measurement with grazing flow
AIAA | 2001
|Acoustic measurement of boundary layer flow parameters
Online Contents | 2007
|Slow-Wave Acoustic Isolation For Measurement Of Flow
NTRS | 1993
|ACOUSTIC MEASUREMENT SYSTEM AND PARAMETER GENERATION DEVICE
Europäisches Patentamt | 2019
|